-
In 1895, Marconi, an Italian inventor, sent and received the first radio signal.
-
Lee De Forest created or "borrowed" the idea for the audion tube which amplified signals.
-
It is believed Reginald Fessenden, a Canadian Inventor, actually came up with the idea, but didn't seem to make it to the history books.
-
In 1920 radio stations started to make an appearance in the radio world. Frank Conrad invented 8XK which is now known as KDKA and is still around in Pittsburg, Pennsylvania.
-
In 1922, WEAF aired a 10 minute commercial or toll broadcast, for an apartment complex charging $50.
-
FRC was established in 1927. The FRC organized the licensing of transmitters and assigned radio station frequencies, call letters, and power limits.
-
W is the East of the Mississippi River
K is the West of the Mississippi River -
Amplitude Modulation
Modulation means to change the waves. -
Frequency Modulation
-
The 30s and 40s was the time of the Great Depression. At this time, radio provided distraction from the real world problems.
-
TV appeared in the late 30s. Advertisers went to TV to try and make more money. This caused radio to lose money, and radio shows eventually ended.
-
Major Edwin Armstrong invented the FM transmitter, which made a stronger signal and higher quality sound. The government made listeners buy new radio sets
